#5591. Rate-dependent fracture modeling of bituminous media using nonlinear viscoelastic cohesive zone with Gaussian damage function

August 2026publication date
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Engineering
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Abstract:
Cracking of bituminous materials is one of the main distresses that results in roadway failure. As bituminous media are highly rate-dependent at intermediate temperatures due to the viscoelastic nature of the binding materials, cracking is also highly rate-dependent viscoelastic. This presents a clear need to address the phenomenon in the modeling-analysis process for a more accurate design of mixtures and pavements. This study proposes an advanced computational modeling method to predict complex rate-dependent cracking in bituminous materials and pavements. In particular, we explored an extrinsic nonlinear viscoelastic cohesive zone (NVCZ) integrated with Gaussian damage evolution. To examine the modeling method and its validity, two modeling efforts in multiple length scales were made: mm-scale material-level modeling and cm-m scale hierarchical modeling that linked the mixture with pavement structure.
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